PROBLEM TO BE SOLVED: To provide a liquid storage device which allows downsizing of a storage part for storing the liquid sucked from a patients eye and yet stable measuring of the liquid level in the storage part.SOLUTION: The liquid storage device includes: a storage part in which liquid is stored a suction part which sucks the gas inside the storage part to reduce the pressure inside the storage part, so that liquid is drawn into the storage part and a liquid level measurement part for measuring the liquid level of the liquid stored in the storage part. The storage part comprises: a liquid intake port through which liquid is taken in a liquid receiving chamber into which liquid is taken through the liquid intake port a liquid level measurement chamber in which the liquid level of the liquid is measured by the liquid level measurement part a first partition for separating the liquid receiving chamber and the liquid level measurement chamber while allowing partial communication therebetween and a liquid drain port for letting the liquid stored in the storage part drain. The liquid intake port is provided at a position which is above the liquid level of the liquid stored in the liquid receiving chamber.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】患者眼から吸引される液体の貯留部を小型化しながら、当該貯留部内の液位を安定して測定できる液体貯留装置を提供する。【解決手段】液体貯留装置であって、液体が貯留される貯留部と、貯留部内に液体を取り入れるために貯留部内の気体を吸引して貯留部内の圧力を下げる吸気部と、貯留部内に貯留される液体の液位を測定する液位測定部と、を有し、貯留部は、液体を取り入れる液体取り入れ口と、液体取り入れ口から液体が取り入れられる液体取り入れ室と、液位測定部により液体の液位を測定するための液位測定室と、液体取り入れ室と液位測定室とを一部連通させながら分ける第1の仕切りと、貯留部内に貯留される液体を排出する排液口と、を備え、液体取り入れ口は、液体取り入れ室内に貯留される液体の液面よりも上方となる位置に設けられている。【選択図】図4
